<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>doWhile循环结构</title>
</head>
<body>
<script>
    var n = 1;
    do {
        console.log("hello world");
        n++;
    }while(n < 100)
</script>
</body>
</html>